June 1994

4

Philips Semiconductors

Product specification

Brushless DC motor drive circuit

TDA5144

PINNING

SYMBOL

PIN

DESCRIPTION

SO20

SO28

MOT1

1

1 and 2

driver output 1

TEST

2

3

test input/output

n.c.

3

4

not connected

MOT2

4

5 and 6

driver output 2

n.c.

−

7

not connected

VMOT

5

8 and 9

input voltage for the output driver stages

GND3

6

10

ground supply; must be connected

FG

7

11

frequency generator: output of the rotation speed (open collector digital output)

GND2

8

12

ground supply return for control circuits

9

13

supply voltage

CAP-CD

10

14

external capacitor connection for adaptive communication delay timing

CAP-DC

11

15

external capacitor connection for adaptive communication delay timing copy

CAP-ST

12

16

external capacitor connection for start-up oscillator

CAP-TI

13

17

external capacitor connection for timing

+AMP IN

14

18

non-inverting input of the transconductance amplifier

−AMP IN

15

19

inverting input of the transconductance amplifier

AMP OUT

16

20

transconductance amplifier output (open collector)

n.c.

−

21 and 22 not connected

MOT3

17

23 and 24 driver output 3

n.c.

18

25

not connected

MOT0

19

26

input from the star point of the motor coils

GND1

20

27 and 28 ground (0 V) motor supply return for output stages